QCX2 series electromagnetic starter is used for starting three-phase case electromotor in AC 50 Hz(or 60 Hz),rated insulated voltage up to 660v,rated operating voltage of 380 v under category AC-3.After stopped,it can protec electromotor aginnst overload and phase-loss.And when the voltage in open ciruit is disappeared,it can protection against voltage-loss.The products comply with IEC947-1 and GB14048-4.